Read Chapter 23: The Third Guard

The water pressed against Owen’s ears like a held breath, and the silt clouding from his fins was turning the lake floor into a pale gray fog. Beside him, Alice’s flashlight cut a trembling cone through the murk, illuminating the shape they’d come for.

A causeway. Not the neat Roman paving they’d mapped from the air, but something older, rougher—stones the size of sedan doors, stacked and fitted with a cyclopean precision that made Owen’s archaeologist brain itch. The blocks were dressed with spiral carvings that had no business being underwater, their edges softened by a thousand years of mineral accretion. The structure ran like a spine along the lake bed, disappearing into a throat of darkness where the sediment thinned.

Alice tapped his arm and pointed. A breach in the causeway’s center, where the stones yawned open like a broken jaw. Water shimmered there, moving against the lake’s current, and Owen felt it before he understood it—a warm pulse emanating from the gap, as if something inside was breathing.

He kicked forward, Alice close behind, and the light from her torch spilled into the breach. The chamber below was not a cave but a hall, its walls lined with iron sconces that held no torches, their blackened sockets like empty eye sockets. And at the hall’s far end, set into a raised dais, was a door.

Not the airlock steel of the Mercian’s vault. This was bronze, green with age, its surface worked with the same spiral motif Owen had seen on his father’s torque. The torque that was now in Reeve’s hands, if the bastard hadn’t already melted it down.

Owen’s chest ached with the cold and the dive, but it was a dull background thrum next to the thought of his father. Alive. Beneath this water. Trading himself to hold the sword’s silence.

Owen gestured to Alice, and they swam toward the door, their fins stirring a century of silt. The bronze face was covered in a thin skin of lake material, but as Owen drew nearer, his light caught an inscription, the letters worn but legible. Not Latin. Not Ogham either, but something that sat between them, a script he’d seen only in the margins of his father’s field journals.

Alice grabbed his arm. Hard. Her eyes, magnified through her mask, were wide and fixed past him.

He turned.

Malcolm Reeve stood at the far end of the hall, planted on the causeway’s lip, dry as a priest in his vestments. He wore waders and a yellow rain jacket, and in his hand he held the bronze torque, the metal winking in the light of three flood lamps that had been set up along the stonework behind him. Two men in dry suits flanked him, holding grappling hooks and a chain.

Reeve smiled. His teeth were too white for the dark around them.

“Dr. Callahan,” he said, his voice a weird acoustic trick, carrying through water that should have muffled it. “And the Vaughans’ little daughter. I was wondering when you’d find the back door.”

Owen surfaced his mask, pulling it up to his forehead. The air hit his face, cold and sharp. “That’s my property, Reeve.”

“Property,” Reeve echoed, turning the torque in his fingers. The bronze caught the light, and for a moment, the spiral carvings seemed to move, writhing like eels. “This is not property. This is a ledger. A list of names. Your family’s names, going back further than you know. And like any good ledger, it gets you credit.” He tapped the torque against his palm. “You owed me. Now I’m collecting.”

Alice pulled her mask down, her gaze flicking between Reeve and the bronze door. “He’ll kill us if we try to take it. He’s not here to negotiate.”

Reeve’s smile widened. “The daughter of Emrys has sense. Your father found me the necklace, and the necklace found me the sword. But you haven’t opened the vault yet, have you? Because the sword isn’t the prize. The prize is what the sword is for.” He stepped forward, his boots splashing on the submerged stones. “The third lock. The lake itself. Tell me what the blade does when it meets the water’s heart, and I’ll let you both swim out of here.”

Owen laughed, a short bark that echoed off the bronze. “You think I know? I’ve been chasing ghosts for a week, Reeve. You know more than I do.”

“Don’t be modest. Your father knew. He wrote it down. And I have his notebooks.” Reeve reached into his jacket and pulled out a slim, water-sealed packet, bound in oilcloth. Owen recognized his father’s hand on the label even from ten feet away. “Callahan’s private correspondence. Including the letter where he tells Emrys what he found beneath the lake—before he went down and never came up.”

The airlock. The memory of the Mercian guardian’s voice cut through Owen’s mind: *Your father did not disappear. He traded himself.*

“You had his notebooks this whole time,” Owen said, his voice low, the cold in his veins turning to heat. “You knew where he was. You knew he was alive.”

Reeve shrugged. “I knew he was useful. Underwater, silent, doing what the bloodline does best. But useful men have a shelf life, and his is approaching its end. The guardian will release him when the covenant breaks—or when the sword is freed. Those are the only options. I intend to free the sword.” He glanced at the bronze door. “And I intend to use it to drain this lake dry.”

Owen felt the words land like sediment, slow and heavy. Drain the lake. The third lock was the lake itself. The sacrifice. But Reeve didn’t want the covenant—he wanted the legend, the treasure, the power beneath the water. He wanted to crack the lake open like an egg and gut it.

The pulse from the bronze door grew stronger, warmer, as if it could hear Reeve’s intent.

Alice spoke, her voice steady. “You’ll kill everyone in the valley. The water table, the farms, the town—anyone below the slope will flood.”

“Aye,” Reeve said, with a pleasant smile. “But they’ll have a grand story to tell.”

He nodded to his men, and they moved forward, chains rattling. Owen’s hand went to the dive knife at his waist, even as he calculated the distance to Reeve, to the door, to the exit. Three men. One flooded hall. No exit behind them but the breach, and Reeve’s men were already closing it with a weighted net.

The bronze door shuddered.

It was a low, grinding vibration, felt more than heard, traveling up through the stone and into Owen’s boots. The water rippled, and a hairline crack traced a path across the door’s face, spreading like frost. Reeve’s men stopped, gaping at the structure as it moved with a sound like a thousand stones grinding together.

The crack widened, and a tongue of pale light licked out, cold and green, illuminating the hall. And in that light, Owen saw a figure behind the door—a shadow, seated, with shoulders bowed as if under a great weight.

His father’s silhouette. He knew it. He’d known it his whole life, even in dreams.

“Father,” Owen breathed.

Reeve’s head snapped toward him, and for the first time, his composure cracked—not with fear, but with hunger. “He’s attached to the lock,” Reeve said, almost to himself. “They used him as the bolt. The third guard’s wound into the door.” He laughed, a wet, pleased sound. “That’s better than a treasure. That’s a lever.”

Owen didn’t wait. He kicked off the floor and drove toward his father’s silhouette, the cold water screaming past his ears, the bronze door groaning open inch by inch before him.

The light swelled, and the shadow behind the door raised its head.